Scrap bundling and briquetting press



ug- 1952 w. LINDEMANN ETAL 2,605,657

SCRAP BUNDLING AND BRIQUETTING PRESS- Filed Feb. 27, 1951 IN V EN TORS WALDEMAR L/NDEMA /v/v FRITZ VAN ENDERT ATTORNEY Patented Aug. 5, 1952 SCRAP BUNDLING AND ES-S saiouur'rmo Application February 27, 1951, Serial N6. 213,031 r,

The invention relates to bundling presses and particularly to an hydraulic press for briquetting and bundlingmetal scrap such as'borings, turningsand tion in p'art of our copending U. S. patent'application Ser. No. 89,244 filed April23, 1949, and now abandoned. r 1

Experience resulting from the operation of the bundling press disclosed in U. "S. Patent 1,812,797 has instigated thisinvention forming an important improvement of the prior press.

-During the closing of the tight fitting lid of the known press, the scrap is moved in the direction of its closure movement towards its front edge; The cooperation and the contact of the front edge of the lid with the stationary counterwedge of the press box takes place simultaneously along the whole length of the edge in con'tradistinction to the two lateral edges of the lid, which form, in the various positions of the lid, cutting angles with the lateral edges of the press box. The front edge of the lid actually does not form a cutting angle with the edgeof the press box. Cutting without a cutting angle, which is i an equivalent of stamping, however, requires a high cutting force, which in conformity with the lever rules is a minimum at the front edge of the lid. "The mounting of counter knives at the front wall of the press box in order tothereby create cutting angles, is not advisable from a practical standpoint, becausethe closing movement of the front 'edgeof the lid progresses along an arc of a'circle and inclined knives cannot be applied to the'counterpart of a cylindrical plane. Therefore, the danger of a jamming of the scrap parts and particularly of the lid arises with inaccurately fitted edges and knives.

This danger of lid jamming is further increased by the location of the center of the lid axis or ofJthe center of rotation of the lid, necessitated by structural reasons, at a higher level than the lower edge of the lid.

The front edge of the lid will therefore ex centrically pass the stationary box wall and contact thesame prior to the closing of the lid. In the closure position, the'front edge of the lid has already moved away from the front counter wall of the box. The distance between the lid edge and the counter wall-of the press box is further increased in the closure position.

A scrap piece which has been jammed between the lid edge and the counter wall of the press box is jammed at an increasing degree during the ascension of the lid and the lid is the like; the invention is a continua- In Germany October 1, 1948 1 Claim. (ems-.5)

a 2 t gclamped with such tremendous force that it often takes hours to remove the jammed scrap pieces and open the lid.

J Mo'reover, protective plates often screwed to the undersideof this lid areheavily damagedor torn-off. The jammed scrap pieces tear-out parts of these plates during the opening of'the lid. Even frequent breakages of the press box'occur; in any way, the jamming of thescrap between the=lid and the front wall of the press box is a most cumbersome and dreaded'disturbance of the operation of these bundling presses, since the liberation of the lid'is extremely difficult and time consuming. J i, 1

In conformity with the above, the following items form a serious handicap in the operation of the instant scrap bundling presses:

1. The accumulation of scrap at the front edge of the lid caused by the closing of the lid whereby thescrap is pushed towards this front edge;

2. The linear contact of the front edge of the lid with the counter or front wall of the press box and the absence of a proper cutting angle;

3. The excentric position of the front edge of the lid relative to the axis of rotation of the lid and the resulting play increase relative to the counter wall in'th'e closure position;-

4. Increase of operational costs and time caused by the release of the" lid and repair of the press. I

" It is the main object of the invention to eliminate these disadvantages for the purpose of securing an'interruption-free progress of the work. h

It is also'an object of the invention to eflect an indirect scrapcutting action by the press lid and to,transfer,.the actual scrap severance to other parts of the press. 3

It is a furtherlobject of the invention to reduce the power requirements of the press and particularly of'the lid which. is relieved of its direct cutting function. V

It is also an object-of the invention to. enable a less heavy construction and mounting of the press; g V l With thes and additional objects in view which will become apparent as this description proceeds, the invention comprises in its broad aspect the provision in the closed state of the press of a free space between the front edge 1 of the lid and the chamber edge of the press box wherein projecting and obstructive parts. of the scrap may be held without giving rise to jamming and the provision of a cutter to the horizontal held in the free space between the upper edgev of the press box and the front edge of the lid in such a manner that all requirements prevail for a free and unhampered severing of projecting scrap parts by the plate of the press ram. The

latter progresses during the compression of the scrap charged into the press box in 'a-straight line towards the edge of the lid at the same time effecting the closure of the box in a manner similar to the cutter of steel plate shears. The press ram'is so dimensioned inview of 'thecompacting work for the compression of the scrap that it is enabled to easily sever all projecting portions'of the scrap. Since the edge of the press plate'and the front edge 'of the lid" are located in the same plane, inclined cutters may be mounted, for instance at the front edge of the lid, whereby a cuttinga-ngle of any desirable inclination can be installed. e

It should be noted "that for the instant press where the lid does not cut/itself less heavy driving means may be used.

In order to exclude an upward evasion of the front edge of the lid due to thecutting pressure of thepress plate, it is advisable'tc either providethe liddrive' withta'istopping device which may be preferably automatic or to effect the stopping of the :lid by bolts provided in the lateral walls of the pressbox;

Theinvention is by Way of example illustrated the attached" drawing. In the drawing 'Fig. 1 is a vertical sectional view of the press box on-lirie ll of Fig.2; and

' Fig. 2is a top plan view of thebox.

The press box composed of frontwall 9, rear wall 12, lateral walls 8 and bottom I3 is provided with a horizontalpreliminary press plate 2 and a vertical finishingpress plate 3. Lid l is rotatably carried on shaft 4. The lid is hydraulically operated by the piston 6 which is movable in cylinder 5; piston 6 is connected with extensions 1 of lid I. The two lateral sides of the lid enter closely to the walls Binto the press box; the

lid is shortened relative to the same whereby upon closure .of the lid, a free .space results of at least- .100 .millimeterslf and up to 150 millimeters between the front edge of thelid and the front wall 9 of the press box. Thelfront edge of the lid is provided with cutters I U which are alternately inclined; accordingly cutting angleswill be created'with the cutters I I of. the preliminary press plate 2.

The above described scrap briquetting press is operated in the following manner.

charging of the scrap into the inner operating space of the press box. The scrap is charged and the lid is closed compressing the scrap accumulated in the press box during its downward movement and severing those scrap pieces which project over the edges of the box. At the same time, the frontredge' of the lid which is' provi'ded with the knives l0, catches those scrap parts which are located between itself and the opposite wall 9 of the press box and draws the same along this wall into thepress box without jamming; due to the free space of between 100-150 millimeters beis advanced whereby the scrap pieces located be The lid I is moved into an essentially vertical position whereby full access is effected for the tween the lid and the box wall in the closed state of the lid. As soon as the lid has reached its final position, the preliminary pressing plate 2 tween lid I and the front wall 9 of the press box are 'severed'by the knives I0 and I l.

' Rolls l6 and/or spring l9 operated blocking means I! located in support H! are provided to prevent the lifting of the lid.

Theessentialdeviation from the prior pressdisclosed in-Patent No.--.1,8l2,'797 resides therein that the lid I does not fit tightly into the press-box and that a free space of about -150 millimeters is provided between the front edge of the lid and the opposite edge of the frontwall 9 of-t-he press box in the closed stated the lidwhereby the projecting scrap parts are exposed without jamming to the cutting action initiated by the press plate 2 of the preliminary press ram ll.

The invention has "been described with reference to a preferred embodiment and it will be understood that many variations and modifications thereof maybe resorted to without departure from the scope of theinvention as'defined in the following claim.

Having thus described the invention, what we claim as new and'desire-to be secured by Letters Patent, is as follows:

A scrap bundling and briquetting press comprising a press box composed of a rear wall, two lateral walls,:-a front wall and 'a bott-orn,'a preliminary and a finishing press ram located in the front wall and the bottom'ofsaid press box, means to advance said preliminary ram in a horizontal and said finishing ram in a vertical direction into said press box, a closure lid pivotally attached to said rear wall, means to .lowersaid lid into the-press box for cutting cooperation with said preliminary'ram, a straight cutter applied to the front. edge of-said preliminary ram, a zigzag shaped cutter applied to the front'edge of said lid, said lidbeingspaced in its closure position at least .100 millimeters from the front wallof the box. I

FRITZ'VAN ENDERT.

REFERENCES CITED The following references are of record inthe file of this patent: I

UNITED STATES PATENTS 

